code.delx.au - pulseaudio/blob - src/pulsecore/cli.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31
  32 #include <pulse/xmalloc.h>
  33
  34 #include <pulsecore/ioline.h>
  35 #include <pulsecore/module.h>
  36 #include <pulsecore/sink.h>
  37 #include <pulsecore/source.h>
  38 #include <pulsecore/client.h>
  39 #include <pulsecore/sink-input.h>
  40 #include <pulsecore/source-output.h>
  41 #include <pulsecore/tokenizer.h>
  42 #include <pulsecore/strbuf.h>
  43 #include <pulsecore/namereg.h>
  44 #include <pulsecore/cli-text.h>
  45 #include <pulsecore/cli-command.h>
  46 #include <pulsecore/log.h>
  47 #include <pulsecore/macro.h>
  48
  49 #include "cli.h"
  50
  51 #define PROMPT ">>> "
  52
  53 struct pa_cli {
  54     pa_core *core;
  55     pa_ioline *line;
  56
  57     void (*eof_callback)(pa_cli *c, void *userdata);
  58     void *userdata;
  59
  60     pa_client *client;
  61
  62     int fail, kill_requested, defer_kill;
  63 };
  64
  65 static void line_callback(pa_ioline *line, const char *s, void *userdata);
  66 static void client_kill(pa_client *c);
  67
  68 pa_cli* pa_cli_new(pa_core *core, pa_iochannel *io, pa_module *m) {
  69     char cname[256];
  70     pa_cli *c;
  71     pa_assert(io);
  72
  73     c = pa_xnew(pa_cli, 1);
  74     c->core = core;
  75     pa_assert_se(c->line = pa_ioline_new(io));
  76
  77     c->userdata = NULL;
  78     c->eof_callback = NULL;
  79
  80     pa_iochannel_socket_peer_to_string(io, cname, sizeof(cname));
  81     pa_assert_se(c->client = pa_client_new(core, __FILE__, cname));
  82     c->client->kill = client_kill;
  83     c->client->userdata = c;
  84     c->client->owner = m;
  85
  86     pa_ioline_set_callback(c->line, line_callback, c);
  87     pa_ioline_puts(c->line, "Welcome to PulseAudio! Use \"help\" for usage information.\n"PROMPT);
  88
  89     c->fail = c->kill_requested = c->defer_kill = 0;
  90
  91     return c;
  92 }
  93
  94 void pa_cli_free(pa_cli *c) {
  95     pa_assert(c);
  96
  97     pa_ioline_close(c->line);
  98     pa_ioline_unref(c->line);
  99     pa_client_free(c->client);
 100     pa_xfree(c);
 101 }
 102
 103 static void client_kill(pa_client *client) {
 104     pa_cli *c;
 105
 106     pa_assert(client);
 107     pa_assert_se(c = client->userdata);
 108
 109     pa_log_debug("CLI client killed.");
 110     if (c->defer_kill)
 111         c->kill_requested = 1;
 112     else {
 113         if (c->eof_callback)
 114             c->eof_callback(c, c->userdata);
 115     }
 116 }
 117
 118 static void line_callback(pa_ioline *line, const char *s, void *userdata) {
 119     pa_strbuf *buf;
 120     pa_cli *c = userdata;
 121     char *p;
 122
 123     pa_assert(line);
 124     pa_assert(c);
 125
 126     if (!s) {
 127         pa_log_debug("CLI got EOF from user.");
 128         if (c->eof_callback)
 129             c->eof_callback(c, c->userdata);
 130
 131         return;
 132     }
 133
 134     pa_assert_se(buf = pa_strbuf_new());
 135     c->defer_kill++;
 136     pa_cli_command_execute_line(c->core, s, buf, &c->fail);
 137     c->defer_kill--;
 138     pa_ioline_puts(line, p = pa_strbuf_tostring_free(buf));
 139     pa_xfree(p);
 140
 141     if (c->kill_requested) {
 142         if (c->eof_callback)
 143             c->eof_callback(c, c->userdata);
 144     } else
 145         pa_ioline_puts(line, PROMPT);
 146 }
 147
 148 void pa_cli_set_eof_callback(pa_cli *c, void (*cb)(pa_cli*c, void *userdata), void *userdata) {
 149     pa_assert(c);
 150
 151     c->eof_callback = cb;
 152     c->userdata = userdata;
 153 }